Tutorials, deep-dives, and privacy-first thinking about developer tools.
Showing 97–108 of 111 posts
Generate the 1024×1024 App Store icon plus every iPhone, iPad, Spotlight, and Settings size from one PNG. Free, no upload, transparency stripped — ready for App Store Connect in 30 seconds.
An online Markdown viewer that renders MD to HTML in real time — paste, see the formatted preview, copy the HTML or the rendered text. 100% in your browser.
A text-to-QR generator handles more than URLs: encode Wi-Fi, vCard, SMS, mailto, calendar, geo, and payment payloads with proper escaping for 2026.
Apple touch icon generator that builds every iOS, iPadOS, and Safari pinned-tab size from one source — no upload, no sign-up, on-brand in 30 seconds.
Free online mipmap generator — turn one source PNG into every Android density (mdpi → xxxhdpi) plus adaptive icons, ready as a drop-in res/ folder. No Android Studio, no upload.
Compare the best free online Markdown editors of 2026 — covering live preview, GitHub Flavored Markdown, syntax highlighting, and zero sign-up.
A technical look at how every iKit tool processes your files locally — WebAssembly, OffscreenCanvas, Web Crypto, and the patterns that replace server round-trips.
iKit is 14 free online tools — none of them upload your files. Here's the story of why I built it that way, and what it means in practice for the people using it.
Three ways to format ugly JSON — IDE plugins, CLI tools like jq, and privacy-first browser formatters — compared on speed, privacy, and ergonomics.
Generate a UUID v4 in one line across browser, Node, Python, and CLI — and learn the three cases where UUID v4 is the wrong identifier to reach for.
Base64 explained with 10 working examples — encode and decode in the browser, terminal, JavaScript, Python, and JWTs. Includes URL-safe variant and the `==` padding rule.
Strong passwords don't need to be random gibberish. Learn four memorable patterns that meet NIST rules — plus when to let a generator do the work.